/Engine/Source/Editor/UnrealEd/Public/Editor.h
Called when an asset is about to undergo a destructive action caused by the Editor UI (Delete, Move, Rename, Privatize, etc.)
static [FOnPreDestructiveAssetAction](API\Editor\UnrealEd\FEditorDelegates\FOnPreDestructiveAssetAction) OnPreDestructiveAssetAction;